Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 21, NWS Lake Charles, LA

February 27, 1999Orange County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at Feb 27, 1999, 4:13 PM CST for Orange County, Texas. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 27, 1999, 4:13 PM CST (22:13 UTC)
Expired
Feb 27, 1999, 5:15 PM CST
In force
62 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

County Orange County, TX

The radar

The Lake Charles radar (KLCH), 65 km from the middle of the area, began a volume at 22:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.2 hours before the alert went out and 67 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 1999-02-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 520 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 1999-02-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
520 J/kg
Mixed-layer CIN
-134 J/kg
Mixed-layer LCL
657 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KLCH 272214 RRA
SVRLCH
TXC361-272315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
413 PM CST SAT FEB 27 1999

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ORANGE COUNTY IN SOUTHEASTERN TEXAS

* UNTIL 515 PM CST

* AT 412 PM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM 25 MILES WEST OF ORANGE OR 4 MILES
  SOUTHWEST OF LAWSON CROSSING MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR
  VIDOR BY 420 PM CST
  ORANGEFIELD BY 440 PM CST
  BRIDGE CITY BY 445 PM CST


SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEA>DLY LIGHTNING AND TORRENTIAL RAIN. FOR
YOUR PROTECTION...SEEK SHELTER IN A STRONG BUILDING. STAY AWAY
FROM WINDOWS AND AVOID USING TELEPHONES...COMPUTERS OR OTHER
ELECTRICAL EQUIPMENT UNTIL THE STORM HAS PASSED.

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 27, 2:30 PM CSTSevere Thunderstorm WarningLCHNewton60 min
Feb 27, 2:38 PM CSTSevere Thunderstorm WarningLCHTyler62 min
Feb 27, 3:03 PM CSTSevere Thunderstorm WarningLCHJasper62 min
Feb 27, 3:37 PM CSTSevere Thunderstorm WarningLCHNewton63 min
Feb 27, 3:44 PM CSTSevere Thunderstorm WarningLCHJefferson66 min

Nearby

Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.